<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>用户登录系统</title>
</head>
<body>
<form action="login" method="post">
    <div>
        <h1>用户登录</h1>
        用户名：<input type="text" name="username">
        密码：<input type="password" name="password">
        <input type="submit" value="提交">
    </div>
</form>

</body>
</html>